Convert WMA to FLAC Online
Need to convert WMA to FLAC right now? Drop your file and get results in seconds. Everything runs in your browser. Your audio never leaves your device.
Drop your WMA file here or click to browse
WMA (.wma) · Max 20 MB
AudioUtils converts WMA to FLAC using WebAssembly. The entire process happens locally. No upload, no server, no waiting in a queue.
Open any browser. Pick your file. Click convert. The FLAC file downloads instantly. Works on any device with a modern browser.
WMA is lossy. Converting to FLAC won't restore lost data, but gives you an uncompressed container for editing workflows. Free tier handles input files up to 20MB file size limit with a 10-second preview output. Upgrade to Pro for unlimited, full-length conversions up to 500MB file size limit.
Frequently Asked Questions
Will the FLAC sound better than the WMA?
No. FLAC's lossless compression is applied to whatever the WMA decoder outputs. If the WMA is lossy (most are), the audio is whatever the WMA encoded — FLAC just stores it without further loss. WMA Lossless source files become bit-perfect FLACs (the audio data is identical, just in a different container).
How much larger will the FLAC be?
Typically 5–8× the WMA size at common bitrates. A 5 MB WMA at 128 kbps becomes a 25–40 MB FLAC. The larger size reflects FLAC storing the full decoded waveform, while WMA discarded data the encoder thought you wouldn't hear.
What about WMA Lossless?
If your file is WMA Lossless (check in Windows Media Player → File → Properties → File tab, look for 'Windows Media Audio 9 Lossless'), the FLAC output is bit-perfect. Sample for sample identical to the source. This is the ideal use case for WMA → FLAC conversion.
Why not convert to MP3 instead?
MP3 is lossy — converting WMA → MP3 stacks two lossy passes and degrades quality. MP3 is fine for casual listening but not for archiving. FLAC freezes whatever quality the WMA had without further loss, making it the right archive choice.
Will tags transfer?
Basic tags (title, artist, album, year, track number) transfer to FLAC's Vorbis comments. WMA's extended Microsoft-specific metadata may not map. Album art usually transfers. Verify with a tag editor after batch conversion.
What about DRM?
DRM-protected WMA (from old MSN Music, Zune Pass, etc.) cannot be converted in a browser. Conversion attempts will fail or produce silence. To free DRM-locked WMA, you'd need to play it through licensed software while recording the output — not something we support.
About WMA
Windows Media Audio. Microsoft's format. Common on older Windows systems and devices.
About FLAC
Lossless compression. Perfect quality at roughly half the size of WAV. The choice for audiophiles and archiving.